Automatic devices for centering the moving processing cloth



May 19, 1970 M. s. NEIFELD ETAL 3,512,591

AUTOMATIC DEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Filed Dec.7, 1967 3 Sheets-Sheet l l Q mm (m B mo c & a Q f 3 n M R w ww. 6 Q w a1 O 0 i Q Q E M O m M III! 1.||I|I|:I M w m w ww w m May 19, 1970 M. s.NEIFELD ETAL AUTOIATIC DEVICES FOR-CENTERING THE MOVING PROCESSING CLOTH3 Sheets-Shet 3 Filed Dec. 7. 1967 y 1970 M. s. NEIFELD ETAL 3,512,591

AUTOMATIC DEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Filed Dec.7. 1967 3 Sheets-Sheet s ILL! United States Patent 3,512,691 AUTOMATICDEVICES FOR CENTERING THE MOVING PROCESSING CLOTH Mark SolomonovichNeifeld, Pavel Samuilovich Moroz, Leizer Zelikovich Nemenman, andVladimir Sergeeviclh Ushakov, Moscow, U.S.S.R., assignors to SpetsialnoeKonstruktorskoe Bjuro Po Oborudovaniju dlya proizvodstvaasbestotsementnylrh Izdely I Rulonnokrovelnykh Materialov, Moscow,U.S.S.R.

Filed Dec. 7, 1967, Ser. No. 688,823 Int. Cl. B65h 25/06 US. Cl. 226-234 Claims ABSTRACT OF THE DISCLOSURE A moving processing cloth iscentered by adjusting the angular position of an adjusting roll throughthe action of a movable barrel of a power cylinder. The barrel is movedby the operation of a slide valve distributor, the piston of which isactuated by a rocking shaft one end of which is connected to aspring-loaded follower bar engaging a cam on the barrel and the otherend of which is connected to a displaceable rod which in turn isconnected through a rope, lever, or hydraulic mechanism to a pair ofspring loaded pivotal levers carrying rollers engaging the edges of themoving cloth.

The invention relates to automatic devices for centering movingprocessing cloth, in particular in sheet-forming machines intended forfibre-cement, paperand cardboard-making industries.

The conventional automatic devices for centering the moving processingcloth in said machines are provided with an adjusting roll driven by ahydraulic cylinder receiving the command signals from feelers rigidlysecured on a common movable axle or independent of one an other.

A disadvantage common to all conventional devices is that they fail tocenter the cloth when its width is varied in operation.

This especially refers to smooth woolen cloth.

An object of the invention is to eliminate the above disadvantage.

The object is achieved by providing a device with two operativelyinterconnected spring-loaded levers carrying feelers at their ends, arod of an operative interconnection mechanism of the levers being joinedto one end of a rocking shaft contacting the piston of a slide valvedistributor for the power cylinder of the adjusting roll, whereas theother end of the rocking shaft is joined to the s ringloaded barinteracting with the cam secured on the movable barrel of the powercylinder which is articulated to the adjusting roll.

One mode of the operative interconnection of between the levers is arope arrangement, wherein the ropes attached to the levers are reevedaround a drum mounted on the rod of the operative interconnectionmechanism for the levers.

Such operative connection between the levers can be also carried out bymeans of bars articulated the levers and to the arms of a double-armlever connected to the rod of said operative interconnection mechanismfor the levers.

In the case of operating with very wide cloth pieces, said operativeinterconnection mechanism comprises auxiliary power cylindersarticulated to the levers, whose inner chambers intercommunicate viapipe-lines which, in turn, communicate with the spaces of one furtherpower cylinder whose rod serves as the rod of said operativeinterconnection of the levers.

Such an embodiment of the drive ensures a reliable 3,512,691 PatentedMay 19, 1970 centering of the processing cloth with respect to the longitudinal axis of the machine even when a variation in the width of clothoccurs during operation.

The first two modes of the operative interconnection mechanism betweenthe levers are used for rather narrow cloth pieces, i.e., with a widthof up to 2500 mm., the third mode being suitable for wider cloth pieces.

Given hereafter is a detailed description of specific and preferredembodiments of the invention with reference to the appended drawings,wherein:

FIG. 1 is a diagrammatic illustration of a device made according to theinvention, wherein the operative interconnection between the levers ismade as a rope arrangement;

FIG. 2 shows the same device wherein the operative interconnectionbetween the levers is constructed as a leverage;

FIG. 3 shows the same device, wherein the operative interconnectionbetween the levers is constructed as a hydraulic system.

The device for centering the processing cloth comprises an adjustingroll 1 (FIGS. 1, 2 and 3) mounted on a platform 2 the middle portion ofwhich is secured on the bed (not shown in the drawing) by means of ahinge joint 3. The roll 1 is turned by a power cylinder Wl'llCh is ahydraulic cylinder in this particular case, said hydraulic cylinder 4being also mounted on the bed and having a moving barrel 5 connected tothe platform 2 by means of a carrier 6. Roll feelers 7 and 8 are mountedat the ends of levers 9 and 10 respectively, the other end of saidlevers being articulated to the bed.

The operative interconnection between the levers 9 and 10 is made byropes 11 and 12 (FIG. 1) reeved around the pulleys 13 and 14 and drum15.

The latter is articulated to a rod 16 which, in turn, is hinged-joinedto the end of a rocking shaft 17.

The latter with its other end is joined to a springloaded bar 18. Therocking shaft 17 rests upon the piston of a slide valve distributor 19.The spring-loaded bar 18 interacts with a cam 20 secured on the movingbody 5 of the drive hydraulic cylinder 4.

Each rope 11 and 12 is reeved around drum 15 in a single-turn loop. Themidpoint of each loop is locked on the drum by screws 21 and 22. Theropes 11 and 12 are interconnected by a spring 23 which presses the rollfeelers 7 and 8 against a cloth 24.

The levers 9 and 10 can be interconnected by means of intermediate bars25 and 26 (FIG. 2) articulated to the arms of a double-arm lever 27which is articulated to the rod 16 of the operative interconnectionbetween the levers 9 and 10.

A spring 28 which presses the roller feelers 7 and 8 against the cloth24 connects the end of the double-arm lever 27 with a strip 29 rigidlyattached to the rod 16.

For operation with cloth pieces wider than 2.5 m., a hydraulic system isused for the operative interconnection between the levers 9 and 10. Inthis case additional hydraulic cylinders 30 and 31 (FIG. 3) arearticulated to said levers, the chambers of said cylinders beinginterconnected via pipe lines 32 and 33 which in turn are connected withthe chambers of one further hydraulic cylinder 34. A rod 35 of saidhydraulic cylinder serves as the rod of the operative interconnectionbetweeii the levers 9 and 10. Springs 36 and 37 which individuallypress-each roller feeler 7 and 8 against the cloth 24 connect the endsof the levers 9 and 10 respectively with the bed.

While in operation, the s rings 23, 28, 36 and 37 (FIGS. 1, 2 and 3)continuously press the roller feelers 7 and 8 against the edges of thecloth 24. If the cloth width is varied in operation but the cloth itselfis not displaced relative to the longitudinal agris of the machine, theposition of the adjusting roll 1 remains constant since the levers 9 and10 move in opposite directions at the same angle. If the operativeinterconnect-ion between the levers is accomplished according to thefirst aforementioned mode, the drum (FIG. 1) will turn about its axiswithout actuating the rod. The drum will turn under the effect oftension of the spring 23 via the ropes 11 and 12 when the roller feelers7 and 8 move to meet each other and by the levers 9 and 10 when saidroller feelers move apart from each other.

If the operative interconnection between the levers is accomplishedaccording to the second of the above said modes, similar displacement ofthe levers 9 and 10 (FIG. 2) causes a displacement of the intermediatebars 25 and 26 while the double-arm lever 27 turns about a pivot 38without actuating the rod 16. In this case the spring 28 performs thesame functions as the spring 23 in the first mode of the operativeinterconnection of the levers.

If the operative interconnection between the levers is accomplishedaccording to the third of the modes mentioned above, said displacementof the levers causes the oil in the hydraulic system to flow between thechambers of the both hydraulic cylinders 30 and 31 (FIG. 3) along thepipe lines 32 and 33 thus by-passing the hydraulic cylinder 34 withoutactuating the rod of the operative interconnection system 35.

When the cloth 24 is displaced relative to the longitudinal axis of themachine to either side, the roller feelers 7 and 8 travel in the samedirection as the cloth. In this case, if the operative interconnectionsystem is accomplished according to the first mode, the rod 16 will bedisplaced in the direction of the lever displacement, but the drum 15will not turn about its axis.

While travelling, the rod 16 actuates, through the rocking shaft 17, theslide valve distributor 19 which lets the oil flow through one of theholes in the stationary piston of the hydraulic cylinder 4 to enter itsmoving barrel 5.

When the barrel 5 of the hydraulic cylinder 4 moves together with thecam 20, the carrier 6 turns the platform 2 and, together therewith, theadjusting roll 1, in either direction, whereby the cloth 24- is made toreturn to the central position.

In this case the spring-loaded bar 18 While interacting with the cam 20,shuts off the slide valve of the distributor 19, whereby the oil feed tothe hydraulic cylinder 4 ceases. Thus, the degree to which the adjustingroll 1 is inclined in an exact agreement with a certain amount of clothdisplacement to either side.

If the operative interconnection is accomplished according to the secondmode, both intermediate bars 25 and 26 and the double-arm lever 27 withthe rod 16 move in the same direction but the double-arm lever does notturn about its axis 38. While moving the rod 16 actuates the rockingshaft 17 and therethrough the entire hydraulic system and the adjustingroll 1 in the above-described way.

If the operative interconnection is accomplished according to the thirdmode, the oil flows from the space of the hydraulic cylinders 30 and 31to the corresponding space of the hydraulic cylinder 34 thus causing itsred 35 to move and actuate, through the rocking shaft 17, the slidevalve distributor 19, hydraulic cylinder 4 and adjusting roll 1 in theabove-described way.

What we claim is:

1. An automatic device for centering moving processing cloth in aforming machine, said device comprising an adjusting roll adjustablymounted on a bed; a power cylinder also mounted on the bed and includinga movable barrel which is coupled to said adjusting roll to adjust theposition thereof; two displaceable spring-loaded levers; roller feelerslocated on said levers for engaging lateral edges ofthe moving cloth;means interconnecting said levers and including a rod which is displacedin accordance with movement of said levers caused by shifting of theedges of the cloth; a rocking shaft connected with said rod forfollowing the displacement thereof; a slide valve distributor having apiston in contact with said rocking shaft for being operated thereby toactivate the power cylinder; at spring-loaded bar operatively coupledwith said rocking shaft; and 'a cam mounted on the movable barrel of thepower cylinder and engaging said springloaded bar to operate the rockingshaft and thereby the distributor inaccordance with change in positionof the movable barrel.

2. A device as claimed in claim 1 wherein said means interconnectingsaid levers comprises a drum and pulleys, and ropes 'reeved around thepulleys and drum, said drum being secured to said rod.

3. A device as claimed in claim 1 wherein said means interconnectingsaid levers comprises bars articulated to said spring-loaded levers anda double arm lever connected to said bars and to said rod to operativelycouple the latter.

4. A device as claimed in claim 1 wherein said means interconnectingsaid levers comprises a power cylinder articulated to each spring-loadedlever, and a further power cylinder having a rod constituted as said rodinterconnecting said levers to actuate the same, said power cylinderswhich are coupled to the spring-loaded levers having intercommunicatingchambers which, in turn, communicate with the chambers of said furtherpower cylinder.

References Cited UNITED STATES PATENTS 3,119,535 1/1964 Hoffman 226233,368,665 2/1968 Jinkins 226-23 X ALLEN N. KNOWLES, Primary Examiner

